Hey all, I did this animation. I am fairly new to animating in blender, and this is my 3rd ever animation. I cannot upload files here, so please find the link below. Thanks!
If you want your animation to look better the very first thing you can try is to render it out instead of screen capturing the viewport with visible camera borders and overlays like an armature
It is looking pretty good, I would say that some things that might help is getting rid of the several twirls it does on the way up or decrease the number so it is not moving as fast. Also if possible add some bones to the syringe so the plunger collapses into the tube when he uses it. It is a great start though